Center post of annular field coil in global Tokamak magnet

Abstract

The invention is a central column for a spherical tokamak magnet toroidal field coil, composed of inner and outer profile conductor layers, where all profile conductors are circumferentially and uniformly distributed; sections of 12 profile conductors are trapeziform in shape, and short bases of them are circularly arranged opposite to the center of the central column; centers of them are formed with natural air flow cooling holes; sections of 12 outer profile conductors are of a quasi-trapezoid with an long arc side in shape, the arc bases of them are opposite to outer surface of the central column and circularly arranged outside the inner profile conductors to form the outer layer of the central column. The top-end and bottom-end terminals of each profile conductor are connected with a turning arm to form a turn of the toroidal field coil, thus forming 24 turns in common; there is a current flowing through each profile conductor and these currents are codirectional and equal, corresponding to ampere-turn of the toroidal field coil. The invention can permit the maximum 12000A pulse current to flow through the toroidal field coil but the inner temperature does not obviously rise.

Description

technical field [0001] The invention relates to the structure of a spherical tokamak toroidal field magnet, in particular to the center column of each turn current of the tokamak toroidal field magnet coil. Background technique [0002] The biggest difference between the spherical tokamak device and the traditional fusion tokamak device is that it has a smaller ring diameter ratio. A small ring diameter ratio will mean that the utilization efficiency of the toroidal field is higher, so the magnetic field requirements for the toroidal field can be lower. For example, the hoop field of a spherical tokamak is about an order of magnitude lower than that of a traditional tokamak. The scale of the spherical tokamak device is much smaller than that of the traditional tokamak device, and the engineering cost is much lower. [0003] In order to obtain the low ring-to-diameter ratio of the spherical tokamak, the structure of the toroidal field magnet is required to be very compact, ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of low conductor filling rate, complicated process, and the need to add an additional cooling system due to the forced water cooling structure of the center column in the prior art, the present invention proposes a spherical tokamak toroidal field magnet coil with a new structure. Turn current collection center column

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